Question: Please help me construct an activity on node network diagram for the above Gantt chart using the ES, EF, LS, LF, Act. name and duration

Please help me construct an activity on node network diagram for the above Gantt chart using the ES, EF, LS, LF, Act. name and duration notation.
Find the critical path and calculate time to completion. Please annotate these two items
What would happened in E could be reduced to 15 min?
PLAN ACTIVITY PLAN START DURATION
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